Nut-tapping machine.



PATENTED JAN. 16, 1906.

s. H. HINTLIAN. NUT TAPPING MAGHINB.

APPLICATION FILED JAN. 10 1905.

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NUT-TAPPING MACHINE.

Specification of Letters Patent.

Patented Jan. 16, 1906.

Application filed January 10, 1905. Serial No. 240,413.

To all whom, it may concern;

Be it known that I, SETH H. HINTLIAN, a subject of the Sultan of Turkey, and a resident of Providence, in the county of Providence and State of Rhode Island, have invented certain new and useful Improvements n Nut-Tapping Machines, of which the following is a specification.

My invention relates to improvements in nut-tapping machines of the class or type in which the nut-blanks are fed to a series of vertically-movable blank-holders positioned with respect to a corresponding series of revoluble taps, which latter operate to tap the nuts and collect or accumulate them on the taps shanks.

l/Vhile, as just stated, this invention relates to nuttapping machines, the essential novelty consists of improved means or devices for automatically feeding the blanks to the holders, combined with means for automatically and simultaneously elevating the holders and contained, blanks to engage the taps, the construction and arrangement being such that one or more of the holders, &c., may be manipulated by hand, if desired, and independently of said automatically-operating mechanism, all as will be more fully hereinafter set forth and claimed.

In the accompanying sheet of drawings, Figure 1 is a front elevation representing in reduced scale a nut-tapping machine embodying my improvements. Fig. 2 is a partial transverse sectional view, in enlarged scale, taken on line :10 0c of Fig. 1. Fig. 3 is a vertical central sectional view taken through the nut blank holder, &c., corresponding with Fig. 2. Fig. 4 is a plan view of the parts shown in Fig. 3. Fig. 5 is a crosssectional view, enlarged, of the feed-chute or runway, taken on line 5 5 of Fig. 3; and Fig. 6 is a detail side elevation of the feed-chute or runway.

The nut-tapping machine A (represented in Fig. 1) shows in general a machine in which my present improvements are incorporated. Certain features of construction are, however, oldas, for example, the frame a, ties a a a &c., the vertical spindles I), the belt-driven pulley c, shaft 0, and pairs of bevel-gears (Z for rotating the spindles, to which latter the taps t are removably secured by means of clutches b and set-screws I) in a well known manner. Treadle-controlled spring-pressed holders or anvils for receiving the nut-blanks singly and holding the latter in position while being tapped have also been employed heretofore. In my improved nuttapping machine the blank holders {and treadles are modified so as to adapt them to the present requirementsthat is to say, the holders h are vertically movable in the horizontal girder or tie a stationary keys or feathers h serving to maintain the holders in position axially at all times. each holder has an open socket or recess 7L2, arranged to receive the nut-blanks w singly, a central hole h, Fig. 3, permitting the passage of the lower or cutting portion of the revolving tap t. The holder has also a lateral opening in direct communication with said socket The upper end of and with the blank-receiving chute or runway i. To the under side of the holder is secured a central guide-rod Z, passing downwardly through the lower tie a and jointed at 0 to a treadle-lever n, in turn pivoted to the base at 0. A helical spring .9, interposed between the tie and holder, operates to automatically raise the latter when pressure upon the treadle is removed. A stop 0 secured to said rod 1, may be employed to limit the upward movements of the latter. (See Fig. 2.)

The runway or chute i has vertical sides and an apertured blank-supporting base i, united at each end, the opening p, just referred to, being arranged to receive a suitable flat flexible belt p, passing over small revoluble pulleys or wheels g 9 located under the chute. The idler or lower pulley g revolves on a short shaft or pin 9 mounted in ears secured to the holder, the other pulley being secured to a continuously revoluble long shaft g, mounted in the frame a. As thus constructed it will be seen that the runway swings or vibrates up and down in unison with the holder, the feeding or runway belt 1) traveling continuously with the revolving pulleys, the said shaft 9, as drawn, forming the pivotal point. The holder when elevated to its limit places the runway in a substantially horizontal position, the belt p meanwhile slackening slightly.

Theshaft 9 extends through lugs or cars '6 depending from the bottom plate 1' of each of the holders 0, these lugs or ears being provided with slots 2' to receive said shaft and permit a slight play of the shafts in said lugs or cars. It is obvious, therefore, that since the pin 9 is mounted in the holder member itself any changes in the distance between the centers of the two members g and g due to the vertical movements of the holder, produces a corresponding change in the tension of the belt, the latter greatly slackening as the holder moves upwardly.

At the front lower part of the machine is mounted a continuously slowly revoluble horizontal shaft f, the latter, as drawn, taking its motion from a pulley 0 secured to the upper driving-shaft c, a power-transmitting belt a, and pulley 0 the latter being secured to the outer or left end of shaft f. On this last-named shaft are secured laterally-separated cranks m, through the eyes of which extends a horizontal shaft or rod m, arranged parallel with shaft f and above the several treadle-levers n, as clearly shown in Figs. 1 and 2. The function of shaft f in each revolution is to cause the rod m to engage the said spring-resisted levers n, thereby gradually depressing them, together with the holders h and feed-chutes i. A loosely-turning spool 1" may be mounted on rod an opposite each lever n and engaging with it.

belts p of said chutes feed the next succeeding blanks into the sockets 7L2. This feed action is effected mainly by means of a belt f driven by a pulley f, secured to the right end of shaft f. Said belt passes over a pulleyf secured to the outer end of shaft g, carrying the pulleys g, which latter impart movement to the feed-belts 1).

As before stated, the taps may be operated singly or simultaneously, as desired, the spindles I) being adapted to receive and hold the taps and capable of being thrown out of action in a well-known manner-that is to say, the construction is such that each holder may be depressed by the operator or attendant and independently of the rod m by means of the corresponding treadle and connections by simply pressing downwardly upon the free end n of the treadle, the spring 8 automatically elevating the holder when the pressure upon the treadle is removed.

The operation of a nut-tapping machine embodying my improvements may be de scribed as follows: The continuously-traveling belts b, aided more or less, say, by gravity action, feeds a blank w from the respective chute i into each of the empty sockets 7L2, the holders meanwhile being depressed below the end of the revolving taps by means of the contact action of the moving rod m with the levers n. After the rod has passed the vertical or dead center the action of springss forces the holders upwardly to engage the blanks with the taps. The latter now out their way through the blanks,. the thus-threaded nuts collecting on the stem or shank of the taps. At or about this time the slowly-revolving shaftf causes the rod m to reengage with and During said downward movement of the holders the traveling ers away from and' below the taps and through Y same time imparting a forward movement to the column of blanks by its engagement wlth their under side, thereby insuring that the blanks do not stop or clog in the runway until the advance blank is properly positioned in the holder with respect to the tap. I may add that the slowly-moving feed-belts p are practically inoperative upon the columns of abutting blanks in the chutes while the blanks in the holders are being tapped, but

immediately become active to agitate and advance the columns again when the lasttapped nuts and taps are disengaged from the holders. The attendant, it may be observed, keeps the chutes supplied with blanks and removes the accumulated nuts from the taps.

A nut-tapping machine provided with my improvements enables the attendant to easily tend one hundred per cent. more spindles as compared with machines of this class as usually constructed. The relative cost of the machines is comparatively small. It is readily accessible, simple, and safe, and not liable to get out of order.

I claim as my invention and desire to se-- cure by United States Letters Patent- 1. In a nut-tapping machine, the combination with a series of suitably-mounted revoluble taps and a corresponding series or number of spring -pressed holders for the nutblanks arranged with respect to said taps, of

chutes from which the nut-blanks are fed to holder, a revoluble tap arranged in alinementwith said holder and a rocking blank containing a chute communicating with and taking its movement from said holder.

8. In a nut-tapping machine, having a revoluble tap, the combination therewith of a vertically-movable spring-pressed nut-blank holder located below and in alinement with the tap, and a vibratory feeding-chute connected with the holder and taking its movement therefrom.

4. In a nut-tapping machine, the combination with a plurality of revoluble taps, and a corresponding number of endwise-movable mechanically-actuated holders adapted to receive nut-blanks singly therein and subject them to the cutting action of said taps, of a depress the levers n, thereby forcing the hold- I revoluble shaft g, a plurality of chutes pivoting chute taking its motion from said holder,

and a downwardly slanting continuouslytraveling belt mounted upon two rollers, one fixed and the other mounted on the movable holder, said belt extending through an opening formed in the base of the chute, of means for automatically depressing the holder after the blank therein has been tapped, thereby at the same time increasing the tension upon 20 said belt and causing it to mechanically feed the next succeeding nut-blank from the chute into the holder, substantially as described.

6. In a nut-tapping machine, the combination with a revoluble tap, of an endwise-movable holder for the nut-blank, a vibratory feed-chute pivotally connected to the holder and taking its movement therefrom, and a feed-belt, a plurality of rollers, said belt being mounted upon said rollers, one fixed and the other mounted on the movable holder, the tension of said belt being affected by the movement of said holder and regulating the feed of the nut-blanks to the holder as the position of the latter Varies.

Signed at Providence, Rhode Island, this 7th day of January, 1905.

SETH H. HINTLIAN. Witnesses:

GEO. H. REMINGTON, J OHN A. BARSAMIAN. 

